Dyfed-Powys Police is investigating an incident following a medical emergency on a bus in Main Street, Pembroke that was reported at approximately 5.35pm on Monday, November 9.

A police spokesperson said: “Three people were taken to hospital. Sadly, one has since died, while two others remain in a serious but stable condition.”

Main Street in Pembroke was closed while police and emergency services worked at the scene but has since reopened.

The police spokesperson continued: “An investigation into the circumstances of this contained incident has commenced, and there is no ongoing risk to the wider public in connection with this incident.

“We thank the local community for their patience while enquiries continue.

“A 55-year-old man has now been arrested on suspicion of being concerned in the supply of controlled drugs and is in police custody.”